var circle = require("./circle.js");

var r = 1.0;
console.log("PI = " + circle.PI);
console.log("circle: r = " + r);
var area = circle.area(r);
console.log("        area = " + area);
var circumference = circle.circumference(r);
console.log("        c = " + circumference);

//var error_r = circle.pow(r);